Spatula knife



FIG. 1 is a perspective view of a spatula knife showing the new design, the broken lines are for illustrative purposes only and do not form a part of the claimed design;

FIG. 2 is a back elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a side elevation view thereof, the opposite side being a mirror image, the broken lines are for illustrative purposes only and do not form a part of the claimed design. 

The ornamental design for a spatula knife, as shown and described. 